NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2002-10-15 717-401 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 FAYETTEVL PA
2002-10-15 774-281 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEWTR MA
2002-10-15 774-282 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOUTHGATE MA
2002-10-15 774-283 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLYMOUTH MA
2002-10-15 774-284 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANSFIELD MA
2002-10-15 781-738 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWELL MA
2002-10-15 803-856 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 BISHOPVL SC
2002-10-15 803-857 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTEE SC
2002-10-15 864-784 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SENECA SC
2002-10-14 201-674 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HACKENSACK NJ
2002-10-14 201-675 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RAMSEY NJ
2002-10-14 228-239 0XXX1XXX2XXX3XXX4XXX5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 BILOXI MS
2002-10-14 256-515 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GADSDEN AL
2002-10-14 269-377 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALAMAZOO MI
2002-10-14 269-414 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → METROPCS, INC. 5562 EDWARDSBG MI
2002-10-14 269-547 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 KALAMAZOO MI
2002-10-14 312-404 not yet reported which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2002-10-14 361-933 3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ROBSTOWN TX
2002-10-14 419-419 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BOWLNGGREN OH
2002-10-14 440-241 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CLEVELAND OH
2002-10-14 479-438 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARIS AR
2002-10-14 575-595 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANGEL FIRE NM
2002-10-14 623-692 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2002-10-14 623-693 5XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2002-10-14 623-696 0XXX2XXX3XXX4XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2002-10-14 623-698 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2002-10-14 717-200 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 LOYSVILLE PA
2002-10-14 717-204 0–9 XXXall 10 · 9 holders which blocks → TWILIO INTERNATIONAL, INC. 506J NEWPORT PA
2002-10-14 717-300 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 SHIPPENSBG PA
2002-10-14 717-320 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MIFFLINTN PA
2002-10-14 717-325 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 MCONELLSBG PA
2002-10-14 870-323 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORNING AR
2002-10-14 870-324 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PIGGOTT AR
2002-10-14 937-681 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 DAYTON OH
2002-10-14 956-277 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LA FERIA TX
2002-10-14 973-580 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SUCCASUNNA NJ
2002-10-12 440-521 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WILLOUGHBY OH
2002-10-11 250-255 not yet reported which blocks → TELUS Mobility 8301 Quesnel —
2002-10-11 423-310 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLEVELAND TN
2002-10-11 562-787 7XXX which blocks → T-MOBILE USA, INC. 6529 LONG BEACH CA
2002-10-11 661-377 4XXX5XXX6XXX8XXX · 2 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BKFD MAIN CA
2002-10-11 778-838 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2002-10-11 806-277 1XXX2XXX6XXX7XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLARENDON TX
2002-10-11 806-278 1XXX2XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MIAMI TX
2002-10-11 806-279 1XXX2XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PANHANDLE TX
2002-10-10 320-262 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 WILLMAR MN
2002-10-10 320-431 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LITTLE FLS MN
2002-10-10 478-217 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 WARNERRBNS GA
2002-10-10 507-403 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NORTHFIELD MN
2002-10-10 507-413 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 OWATONNA MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.